Let me start with a scene I've lived through more times than I can count. You walk a job six months after installation—a neat little plaza with bollard lights, step lights, some wall luminaires. During the day, everything looks fine. At nightfall, three bollards are dark, one step light is flickering, and there's a faint buzzing from the driver behind the wall.
You call the contractor. They say, "It's the LEDs." It's not. Actually, it's rarely the LEDs themselves. Figuring out what's really failing—and why—is the difference between a system that lasts and a recurring headache.
The Surface Problem: You Think It's the Light Itself
When a fixture fails, we assume the LED chip gave out. That's the easiest explanation, and it's usually wrong.
Most buyers focus on lumen output and finish, and completely miss the driver and thermal management—the parts that actually determine life. The LED can be rated for 50,000 hours, but if the driver sits in a sealed aluminum box with no airflow, it cooks. I've seen cut sheets advertising "50,000-hour LED" with a driver that's rated at 70°C yet operating at 90°C inside a black bollard in direct sun. That's the real problem.
The Deeper Problem: Heat, Ratings, and Wiring (In That Order)
Once you stop blaming the LED, the real issues come into focus. They form a kind of chain: heat kills the driver, the driver kills the fixture, and the controls often get blamed.
Heat Is the Real Enemy
LED drivers are the weak link, not the LEDs. Thermal variation inside a fixture can shorten driver life dramatically. A 10W driver mounted inside a stainless steel step light that gets afternoon sun? It's not just hot; it's constantly cycling. The driver is rated at 105°C, but it's running at 98°C for months on end. It will fail well before the LED does. The LED is fine. The driver is the casualty.
Ingress Protection Is a Language Problem
I've rejected a fair number of fixtures—roughly 12% of first samples in 2024. (Maybe 10%, I'm mixing it up with 2023 data.) A big chunk of those had a cut sheet saying "IP65" but no gasket at the diffuser joint. IP65 doesn't automatically mean you can bury it in mulch or point a pressure washer at it. Outdoor landscape lighting is a wet environment. IP66 or higher is often non-negotiable, but the label says IP65 and that gets typed into the submittal, and everyone moves on.
Good thing I caught that one batch of 1,200 bollard lights before they left the factory. The spec said "IP65" but the driver compartment had a weep hole that wasn't sealed. The manufacturer said it was for condensation relief. We said that's not how ground-mounted fixtures work. We rejected the batch, they redid it at their cost. Now every contract includes a sealed driver compartment requirement.
Wiring: The Recessed Lighting Mistake That Kills Fixtures
Here's where the "how to wire in recessed lighting" question comes in. Most installers know how to daisy-chain line voltage. The risk is when the driver is in an insulated ceiling, a wall cavity, or a recessed step with no airflow. You need to follow the driver's derating curve. That's not optional.
I'm not the electrician on our projects, but I talk to them a lot. They tell me about 12-volt recessed lights that are wired like old incandescent cans: all junctions in the same box, transformer hidden in the ceiling. That worked fine for a 5W halogen. It doesn't work for LED drivers that need ventilation and separate thermal zones. The driver overheats in two months. The customer says "the light melted", which isn't literally true, but it's not far off. The fix isn't more tape and more conduit. It's knowing the driver's required derating and wiring it the way the manufacturer says. If the cut sheet doesn't include wiring and derating instructions, that's a red flag.
Lighting Controls: The Missing Compatibility Layer
I keep running into "commercial grade" projects that used high-quality fixtures but paired them with a $15 occupancy sensor from an online surplus site. The driver doesn't like the control method, the dimming flickers, and after a few thousand cycles, the driver gives up.
Controls are part of the lighting system, not an aftermarket add-on. If the fixture's driver is designed for 0-10V dimming, use a controller that speaks 0-10V properly. If you throttle the driver with a leading-edge dimmer that isn't rated for LED loads, you'll get premature failure. I'm not saying only factory-paired controls work. I'm saying you can't treat controls as an afterthought—which, honestly, is where a lot of landscape lighting budgets go wrong.
The Cost of Ignoring This
Let me be blunt here. A $45 step light that dies after nine months seems like a minor warranty claim. But the actual cost to replace it adds up fast:
- The electrician's time
- The lift or scaffolding
- Breaking and replacing the adjacent concrete
- The project manager's coordination overhead
- The general contractor's markup
That $45 fixture can end up costing $450 by the time it's replaced. And that's the simple case. For a recessed light in a finished ceiling, you're now opening drywall, repainting, the whole ordeal.
The bigger cost is the pattern. When a project develops a 10% failure rate in the first year, the design team loses trust. In Q1 2024, we audited a hospitality project with wall luminaires. The fixtures were branded "waterproof," but the internal gaskets had shifted during installation. 30% showed visible condensation. The redo—resealing and reinstalling—ran $22,000 and pushed the opening date by three weeks. (Should mention: the fixtures themselves were only $18,000. So the redo cost more than the original fixtures.)
Think about that. Nobody budgets for the redo. But the redo is the real expense. That's why I've learned to ask "what's NOT included" before "what's the price." The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end. That's true for lighting, and it's true for any industry product.
The Short Version: What to Do About It
I could write a technical bulletin here. The short version is: don't buy fixtures based on the cut sheet alone. Ask the questions most buyers skip:
- What's the driver's rated lifetime at the fixture's maximum ambient temperature?
- What's the IP rating of each component—including the driver compartment?
- Are the wiring and derating instructions actually in the installation manual?
- Does the fixture have a tested control compatibility list?
You want a fixture designed from the beginning for outdoor exposure, not a modified indoor can with a "waterproof" sticker.
I've spent the last four years reviewing fixture families for our catalog. I've tested a lot of brands. The ones that survive our audit are the ones that can show thermal simulation curves, independent IP test reports, and a proper driver selection process. Bega is one of them—their bollard lights and step lights come with actual driver specs and wiring guidelines, and for landscape lighting specifically, they've done the engineering homework. Sports lighting? Same principles, just bigger scale. If you're spec'ing a sports field, driver and control compatibility are non-negotiable.
So the next time you're planning a landscape lighting system, ask the question everyone should ask before "what's your best price?": "What's included in that price?"—and "what's NOT included?" In my experience, the honest answer to that second question is exactly where the problems hide.